The influence of dislocations on crystal growth
F. C. Frank, Discuss. Faraday Soc., 1949, 5, 48 DOI: 10.1039/DF9490500048
Materials Literature
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The theory of the anomalous skin effect in metals
Abstract The problem of metallic conduction at high frequencies and low temperatures, recently discussed by Pippard, is reformulated using the general methods of the theory of metals, and exact solutions are obtained which are valid for all frequencies and temperatures. It is shown that, for large values of the free p…
Statistical Error in Absorption Experiments
In certain exponential absorption experiments, notably measurements of cross sections by transmission, it is important to achieve minimum statistical error in a limited time or to minimize the counting time required to measure the absorption coefficient with a preassigned accuracy. The conditions required to attain th…
TRANSMITTANCE OF NEAR‐INRARED ENERGY BY BINARY GLASSES*
A bstract A study has been made of the transmittance of near‐infrared energy by a number of binary glasses. Of the systems studied, the lithia‐silica and lead oxide‐silica glasses were found to have the highest transmittance of energy in the range of wave lengths from 3.0 to 5.0 microns. The transmittance of lithia‐si…
Mechanics of Elastic Performance of Textile Materials
A technique is developed for the quantitative evaluation of the deformation components of visco-elastic materials when these are subjected to tensile loading, for loads ranging from zero to rupture, under dynamic loading conditions, at constant rates of load, elongation, or strain for different magnitudes of constant…
X-ray studies of halloysite and metahalloysite
Metahalloysite is one of the kaolin group of minerals with a composition approximating to the formuia Al 2 O 3 .2SiO 2 .2H 2 O, and its structure is generally considered to be built of composite layers of atoms of the kind found in other minerals of this group. It differs from them most strikingly in that it can be pr…
Electron Bombardment Conductivity in Diamond
A study has been made of electron bombardment conductivity in diamond using primary electrons of energies up to 14,000 ev. An alternating field method is used which reduces or eliminates the effects of internal space charge fields. Data on internal yields as a function of crystal field are given for both electron and…
Equilibria in Hydrogenation of Esters and of Indoles
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X-ray studies of halloysite and metahalloysite
The experiments described below on the dehydration of halloysite were largely carried out in the laboratoire Central des Services Chimiques de l'État, Paris, where we enjoyed not only the excellent facilities of the laboratory but also the advice of Monsieur J. Méring and Mile R. Glaser who had made similar studies of…
Synthesis of Alkoxymethyltrimethylsilanes
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The crystal structure of zirconium oxysulfide, ZrOS
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The Chemistry of Spiropyrans.
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Polar-Type Rust Inhibitors
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Theoretical Model for Explaining the Ferroelectric Effect in Barium Titanate
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Occurrence of head‐to‐head arrangements of structural units in polyvinyl alcohol
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Photoelectric Emission and Contact Potentials of Semiconductors
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Determination of Tensile Strength of Natural Rubber and GR-S
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A technique is described for the preparation of `single' crystals of BaTiO3. At room temperature the crystals are complexes of habit appropriate to cubic symmetry, but consisting of multiply-twinned tetragonal components with orientation very sensitive to externally applied pressure or electric fields. Optical and X-r…
Ein elektronenoptischer Apochromat
Abstract An einem Rechenbeispiel wird gezeigt, wie sich Elektronenlinsen durch eine für Elektronen durchlässige ebene Metallfolie chromatisch korrigieren lassen. Die benachbarten Elektroden influenzieren auf der Folie negative Ladungen, die die langsameren Strahl-elektronen verhältnismäßig stark nach außen drängen und…